In all US states except for 2, the popular vote determines who ALL the electors are from that state, so the gerrymandering does NOT have a direct impact on the result of the presidential election, or at least not very much (I believe gerrymandering can affect Maine and Nebraska electoral votes, but only a small number of them, much less than the 10% you suggest would be needed).
Gerrymandering DOES impact things like voter ID laws and other policies that can make it harder for certain people to vote, so in that way you could argue that gerrymandering indirectly affects the presidential election.
If you really want to argue that the presidential elections in the US are rigged, you should focus on voting machines I would say. But even then I think it’s a stretch.
Tariffs on Chinese goods are a good thing. And I honestly see why the next logical step is tariffs on Mexico because Chinese companies are already building in Mexico so they can assemble there and ship across the border and circumvent tarrifs.
I think China manipulates markets and damages the global economy while making consumers feel like they don’t need to value the products they buy because they are so cheap. And I don’t think we should be letting China off the hook for the Uyghur genocide/gluttony of human rights violations.
Buy local. I wish it was easier to buy American manufactured stuff.